//------------------------------------------------------------------------------
// File: PsiParser.h
//
// Desc: DirectShow sample code - header file for the PsiParser filter.
//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//------------------------------------------------------------------------------

#ifndef _PSI_PARSER_H_
#define _PSI_PARSER_H_

// Releases the COM Object references safely
#define SAFE_RELEASE(pObject) if(pObject){ pObject->Release(); pObject = NULL;}

//
//  This table was generated with the polynomial 0x04c11db7.  It is used to
//  check the CRC on MPEG-2 PSI, as defined in H.222.0, Systems specification
//

static
ULONG
g_MPEG2_PSI_CRC_32_Lookup [] = {
0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f,
0x2f8ad6d6, 0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9,
0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75, 0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,
0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039, 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,
0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d, 0xd4326d90, 0xd0f37027,
0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c,
0x2e003dc5, 0x2ac12072, 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca,
0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde, 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,
0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba, 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e,
0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6, 0x99a95df3, 0x9d684044,
0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59,
0x608edb80, 0x644fc637, 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f,
0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53, 0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5,
0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff, 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623,
0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b, 0xd727bbb6, 0xd3e6a601,
0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad,
0x81b02d74, 0x857130c3, 0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c,
0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8, 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e,
0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec, 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088,
0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0, 0xd6ad50a5, 0xd26c4d12,
0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06,
0xa6322bdf, 0xa2f33668, 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4 } ;



class CPsiParserFilter;
class CPATProcessor;
class CPMTProcessor;

// Helper functions
static BOOL ConfirmMpeg2PSICRC_32 ( BYTE *  pb, ULONG   ulLen );

HRESULT GetDemuxFilter(IFilterGraph    * pGraph,IBaseFilter ** ppDemux ) ;
HRESULT GetDemuxPsiOutputPin(IBaseFilter * pDemux, IPin ** ppOutPin) ;

// Class supporting the PsiParser input pin

class CPsiParserInputPin : public CRenderedInputPin
{
    friend class CPsiParserFilter;
    friend class CPATProcessor;
    friend class CPMTProcessor;

private:

    CPsiParserFilter *m_pFilter;        // The filter that owns us
    CCritSec * const m_pReceiveLock;    // Sample critical section

    CPATProcessor*   m_pPatProcessor;   // Handles PAT sections
    CPMTProcessor*   m_pPmtProcessor;   // Handles PMT sections

    CPrograms m_Programs;               // Updated by the above two objects
    bool m_bCreated;

public:

    CPsiParserInputPin(CPsiParserFilter *pTextOutFilter,
                  LPUNKNOWN pUnk,
                  CCritSec *pLock,
                  CCritSec *pReceiveLock,
                  HRESULT *phr);

    ~CPsiParserInputPin();

    // Check that we can support this input type
    HRESULT CheckMediaType(const CMediaType *pmt);

    // Here's the next block of data from the stream.
    // Do something with this media sample
    STDMETHODIMP Receive(IMediaSample *pSample);
    STDMETHODIMP EndOfStream(void);

    HRESULT GetPatProcessor(CPATProcessor ** ppPatProcessor);

}; // CPsiParserInputPin

/////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////


// PAT section processor:

class CPATProcessor
{
public:

    CPATProcessor(CPsiParserFilter *pParser,CPrograms * pPrograms, HRESULT *phr);
    ~CPATProcessor();

    BOOL process(BYTE * pbBuffer, long lDataLen);
    BOOL store(BYTE * pbBuffer, long lDataLen);
    BOOL flush(); // delete all programs, PAT and PMT section list

    // from pat: keep track of stream id and pat version # change
    DWORD           m_current_transport_stream_id;  // one pat table per transport stream
    DWORD           m_current_pat_version_number;   // one version# per PAT table

private:

    //parser filter
    CPsiParserFilter    * m_pParser;
    CPrograms           * m_pPrograms;
    IPin                * m_pDemuxPsiOutputPin;

    HRESULT             *m_phr;
    CCritSec m_Lock;

    // keep track of section number
    DWORD           m_pat_section_count;
    DWORD           m_pat_section_number_array[MAX_PROGRAM_NUMBER_IN_TRANSPORT_STREAM];

    // keep track of pmt pids
    DWORD           m_mapped_pmt_pid_array[MAX_PROGRAM_NUMBER_IN_TRANSPORT_STREAM];
    DWORD           m_mapped_pmt_pid_count;

    BOOL IsNewPATSection(DWORD dwSectionNumber);
    BOOL HasPmtPidMappedToPin(DWORD dwPid);
    BOOL MapPmtPid(DWORD dwPid);
    BOOL UnmapPmtPid();
};

// keep track of section version_number for each pmt section identified by program_number
typedef struct Pmt_Version_Of_A_Program
{
    // in each pmt section, the section number field shall be set to zero. 
    // Sections are identified by the program_number field (ISO/IEC 13818-1:1996(E))
    DWORD pmt_program_number;
    DWORD pmt_section_version;


} PMT_VERSION_OF_A_PROGRAM;

// PMT processor:

class CPMTProcessor
{
public:

    CPMTProcessor(CPsiParserFilter *pParser,CPrograms * pPrograms,HRESULT *phr);
    ~CPMTProcessor();

    BOOL process(BYTE * pbBuffer, long lDataLen);
    BOOL store(BYTE * pbBuffer, long lDataLen);


private:
    CPsiParserFilter    * m_pParser;
    CPrograms           * m_pPrograms;

    // from pmt
    // keep track of section # of PMT sections read 
    // one pmt section per program, so we keep an array of section #, 
    // along with their corresponding current version#
    DWORD                       m_pmt_section_count; 

    // note: the number of pmt sections should be >= MAX_PROGRAM_NUMBER_IN_TRANSPORT_STREAM

    PMT_VERSION_OF_A_PROGRAM  m_pmt_program_number_version_array[MAX_PROGRAM_NUMBER_IN_TRANSPORT_STREAM];

    BOOL HasPMTVersionOfThisProgramChanged(DWORD dwProgramNumber,DWORD dwVersionNumber);
    BOOL IsNewPMTSection(DWORD dwProgramNumber);
};

///////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////

// This is the COM object that represents the parser filter

class CPsiParserFilter  :   public CBaseFilter,
                            public IMpeg2PsiParser,
                            public ISpecifyPropertyPages
{
public:
    // Implements the IBaseFilter and IMediaFilter interfaces
    DECLARE_IUNKNOWN

    CPsiParserFilter(LPUNKNOWN pUnk,HRESULT *phr);
    ~CPsiParserFilter();

    // This goes in the factory template table to create new instances
    static CUnknown * WINAPI CreateInstance(LPUNKNOWN punk, HRESULT *phr);

    // Overriden to say what interfaces we support where:
    // ISpecifyPropertyPages, IMpeg2PsiParser
    STDMETHODIMP NonDelegatingQueryInterface(REFIID riid, void ** ppv);

    // Return the pins that we support
    int GetPinCount();
    CBasePin *GetPin(int n);

    // from PAT
    STDMETHODIMP GetTransportStreamId       (WORD *pstreamId);
    STDMETHODIMP GetPatVersionNumber        (BYTE *pPatVersion);
    STDMETHODIMP GetCountOfPrograms         (int *pNumOfPrograms);
    STDMETHODIMP GetRecordProgramNumber     (DWORD dwIndex, WORD * pwVal);
    STDMETHODIMP GetRecordProgramMapPid     (DWORD dwIndex, WORD * pwVal);
    STDMETHODIMP FindRecordProgramMapPid    (WORD wProgramNumber, WORD * pwVal);

    // from PMT
    STDMETHODIMP GetPmtVersionNumber        (WORD wProgramNumber, BYTE *pPmtVersion);
    STDMETHODIMP GetCountOfElementaryStreams(WORD wProgramNumber, WORD *pwVal);
    STDMETHODIMP GetRecordStreamType        (WORD wProgramNumber,DWORD dwRecordIndex, BYTE *pbVal);
    STDMETHODIMP GetRecordElementaryPid     (WORD wProgramNumber,DWORD dwRecordIndex, WORD *pwVal);

    // ISpecifyPropertyPages method
    STDMETHODIMP GetPages(CAUUID *pPages);

    CCritSec        m_Lock;                // Main renderer critical section
    CCritSec        m_ReceiveLock;         // Sublock for received samples

    // Non interface locking critical section
    CCritSec        m_ParserLock;          // To serialise access.

private:

    // The nested classes may access our private state
    friend class CPsiParserInputPin;

    CPsiParserInputPin  *m_pInputPin;      // Handles pin interfaces

    
}; // CPsiParserFilter


#endif


